---
id: "CVE-2026-91609"
kind: "vulnerability"
aliases: ["CVE-2026-91609"]
title: "Oracle REST Data Services: GraphQL flaw exposes data to low-privilege users"
severity: "medium"
cvss: 6.5
epss: 0.00371
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["oracle-database", "oracle-rest-data-services", "ords", "runtime", "self-hosted"]
not_affected_if: ["graphql-not-exposed", "unaffected-version"]
published_at: "2026-10-20T22:21:01+00:00"
first_seen_at: "2026-10-23T21:57:27+00:00"
updated_at: "2026-10-25T03:49:14+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91609", "first_seen_at": "2026-10-23T21:57:27+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-91609", "first_seen_at": "2026-10-24T13:15:55+00:00"}]
---

# Oracle REST Data Services: GraphQL flaw exposes data to low-privilege users

Oracle REST Data Services has a flaw in its GraphQL component affecting versions 24.2.0 through 26.2.1. A remote attacker with a low-privilege account over HTTP can read data they should not have access to.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Oracle REST Data Services version with `java -jar ords.war version` or the ORDS admin console (unknown if the sources give a different command)
- Confirm whether the GraphQL feature is enabled on the instance (unknown if the sources do not say how)

## Fix

- Upgrade Oracle REST Data Services to a release newer than `26.2.1` (the exact fixed version is unknown from the sources)
- Restrict HTTP access to ORDS endpoints until patched (unknown if the sources give a specific setting)

## Timeline

- 2026-10-23T21:57:27+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-91609
- 2026-10-24T13:15:55+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-91609

## From the sources

Vulnerability in Oracle REST Data Services (component: Graph QL).  Supported versions that are affected are 24.2.0-26.2.1. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle REST Data Services.  Successful attacks of this vulnerability can result in  unauthorized access to critical data or complete access to all Oracle REST Data Services accessible data. CVSS 3.1 Base Score 6.5 (Confidentiality impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_